Pedro Walfir Martins e Souza-Filho (born 1972) is a geologist specialized in coastal geology, remote sensing, and environmental geomorphology. He is a Full Professor at the Institute of Geosciences at the Federal University of Pará (UFPA), Brazil. His research focuses on the Quaternary evolution of the Amazon coast, the multiscale analysis of sedimentary processes, and the application of geotechnologies to monitor environmental and land-use changes. He has also advanced the use of integrated GIS and remote sensing approaches for coastal vulnerability assessment and mangrove mapping. His studies aim to understand the resilience and vulnerability of coastal ecosystems to climate change and anthropogenic pressures, contributing to environmental management and sustainable territorial planning in the Amazon.